I think Bob's hit the nail on the head here. If satellite programming is anything like cable, there seems to be a lot of source material at fault -- material that was never intended for more than mono or (at best) stereo reproduction. As a result, even Pro Logic II produces something with very sparse surround activity. Stereo 5 will certainly put a lot more material in the surrounds, but it's basically just a duplication of the mains.

On the other hand, I've occasionally been pleasantly surprised by broadcasts with some good sound design that give PL2 something to work with (I believe it was an episode of Crossing Jordan shortly after I got my 950, with some background music that really opened up nicely, that first caught my attention). It's sadly a bit rare, but it does happen.

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